Mercurial > hg > truffle
comparison src/share/vm/utilities/globalDefinitions.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | d5fc211aea19 |
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1 /* | |
2 * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 # include "incls/_precompiled.incl" | |
26 # include "incls/_globalDefinitions.cpp.incl" | |
27 | |
28 | |
29 // Basic error support | |
30 | |
31 void basic_fatal(const char* msg) { | |
32 fatal(msg); | |
33 } | |
34 | |
35 | |
36 // Something to help porters sleep at night | |
37 | |
38 void check_basic_types() { | |
39 #ifdef ASSERT | |
40 #ifdef _LP64 | |
41 assert(min_intx == (intx)CONST64(0x8000000000000000), "correct constant"); | |
42 assert(max_intx == CONST64(0x7FFFFFFFFFFFFFFF), "correct constant"); | |
43 assert(max_uintx == CONST64(0xFFFFFFFFFFFFFFFF), "correct constant"); | |
44 assert( 8 == sizeof( intx), "wrong size for basic type"); | |
45 assert( 8 == sizeof( jobject), "wrong size for basic type"); | |
46 #else | |
47 assert(min_intx == (intx)0x80000000, "correct constant"); | |
48 assert(max_intx == 0x7FFFFFFF, "correct constant"); | |
49 assert(max_uintx == 0xFFFFFFFF, "correct constant"); | |
50 assert( 4 == sizeof( intx), "wrong size for basic type"); | |
51 assert( 4 == sizeof( jobject), "wrong size for basic type"); | |
52 #endif | |
53 assert( (~max_juint) == 0, "max_juint has all its bits"); | |
54 assert( (~max_uintx) == 0, "max_uintx has all its bits"); | |
55 assert( (~max_julong) == 0, "max_julong has all its bits"); | |
56 assert( 1 == sizeof( jbyte), "wrong size for basic type"); | |
57 assert( 2 == sizeof( jchar), "wrong size for basic type"); | |
58 assert( 2 == sizeof( jshort), "wrong size for basic type"); | |
59 assert( 4 == sizeof( juint), "wrong size for basic type"); | |
60 assert( 4 == sizeof( jint), "wrong size for basic type"); | |
61 assert( 1 == sizeof( jboolean), "wrong size for basic type"); | |
62 assert( 8 == sizeof( jlong), "wrong size for basic type"); | |
63 assert( 4 == sizeof( jfloat), "wrong size for basic type"); | |
64 assert( 8 == sizeof( jdouble), "wrong size for basic type"); | |
65 assert( 1 == sizeof( u1), "wrong size for basic type"); | |
66 assert( 2 == sizeof( u2), "wrong size for basic type"); | |
67 assert( 4 == sizeof( u4), "wrong size for basic type"); | |
68 | |
69 int num_type_chars = 0; | |
70 for (int i = 0; i < 99; i++) { | |
71 if (type2char((BasicType)i) != 0) { | |
72 assert(char2type(type2char((BasicType)i)) == i, "proper inverses"); | |
73 num_type_chars++; | |
74 } | |
75 } | |
76 assert(num_type_chars == 11, "must have tested the right number of mappings"); | |
77 assert(char2type(0) == T_ILLEGAL, "correct illegality"); | |
78 | |
79 { | |
80 for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) { | |
81 BasicType vt = (BasicType)i; | |
82 BasicType ft = type2field[vt]; | |
83 switch (vt) { | |
84 // the following types might plausibly show up in memory layouts: | |
85 case T_BOOLEAN: | |
86 case T_BYTE: | |
87 case T_CHAR: | |
88 case T_SHORT: | |
89 case T_INT: | |
90 case T_FLOAT: | |
91 case T_DOUBLE: | |
92 case T_LONG: | |
93 case T_OBJECT: | |
94 case T_ADDRESS: // random raw pointer | |
95 case T_CONFLICT: // might as well support a bottom type | |
96 case T_VOID: // padding or other unaddressed word | |
97 // layout type must map to itself | |
98 assert(vt == ft, ""); | |
99 break; | |
100 default: | |
101 // non-layout type must map to a (different) layout type | |
102 assert(vt != ft, ""); | |
103 assert(ft == type2field[ft], ""); | |
104 } | |
105 // every type must map to same-sized layout type: | |
106 assert(type2size[vt] == type2size[ft], ""); | |
107 } | |
108 } | |
109 // These are assumed, e.g., when filling HeapWords with juints. | |
110 assert(is_power_of_2(sizeof(juint)), "juint must be power of 2"); | |
111 assert(is_power_of_2(HeapWordSize), "HeapWordSize must be power of 2"); | |
112 assert((size_t)HeapWordSize >= sizeof(juint), | |
113 "HeapWord should be at least as large as juint"); | |
114 assert(sizeof(NULL) == sizeof(char*), "NULL must be same size as pointer"); | |
115 #endif | |
116 | |
117 if( JavaPriority1_To_OSPriority != -1 ) | |
118 os::java_to_os_priority[1] = JavaPriority1_To_OSPriority; | |
119 if( JavaPriority2_To_OSPriority != -1 ) | |
120 os::java_to_os_priority[2] = JavaPriority2_To_OSPriority; | |
121 if( JavaPriority3_To_OSPriority != -1 ) | |
122 os::java_to_os_priority[3] = JavaPriority3_To_OSPriority; | |
123 if( JavaPriority4_To_OSPriority != -1 ) | |
124 os::java_to_os_priority[4] = JavaPriority4_To_OSPriority; | |
125 if( JavaPriority5_To_OSPriority != -1 ) | |
126 os::java_to_os_priority[5] = JavaPriority5_To_OSPriority; | |
127 if( JavaPriority6_To_OSPriority != -1 ) | |
128 os::java_to_os_priority[6] = JavaPriority6_To_OSPriority; | |
129 if( JavaPriority7_To_OSPriority != -1 ) | |
130 os::java_to_os_priority[7] = JavaPriority7_To_OSPriority; | |
131 if( JavaPriority8_To_OSPriority != -1 ) | |
132 os::java_to_os_priority[8] = JavaPriority8_To_OSPriority; | |
133 if( JavaPriority9_To_OSPriority != -1 ) | |
134 os::java_to_os_priority[9] = JavaPriority9_To_OSPriority; | |
135 if(JavaPriority10_To_OSPriority != -1 ) | |
136 os::java_to_os_priority[10] = JavaPriority10_To_OSPriority; | |
137 } | |
138 | |
139 | |
140 // Map BasicType to signature character | |
141 char type2char_tab[T_CONFLICT+1]={ 0, 0, 0, 0, 'Z', 'C', 'F', 'D', 'B', 'S', 'I', 'J', 'L', '[', 'V', 0, 0}; | |
142 | |
143 // Map BasicType to Java type name | |
144 const char* type2name_tab[T_CONFLICT+1] = { | |
145 NULL, NULL, NULL, NULL, | |
146 "boolean", | |
147 "char", | |
148 "float", | |
149 "double", | |
150 "byte", | |
151 "short", | |
152 "int", | |
153 "long", | |
154 "object", | |
155 "array", | |
156 "void", | |
157 "*address*", | |
158 "*conflict*" | |
159 }; | |
160 | |
161 | |
162 BasicType name2type(const char* name) { | |
163 for (int i = T_BOOLEAN; i <= T_VOID; i++) { | |
164 BasicType t = (BasicType)i; | |
165 if (type2name_tab[t] != NULL && 0 == strcmp(type2name_tab[t], name)) | |
166 return t; | |
167 } | |
168 return T_ILLEGAL; | |
169 } | |
170 | |
171 | |
172 // Map BasicType to size in words | |
173 int type2size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, -1}; | |
174 | |
175 BasicType type2field[T_CONFLICT+1] = { | |
176 (BasicType)0, // 0, | |
177 (BasicType)0, // 1, | |
178 (BasicType)0, // 2, | |
179 (BasicType)0, // 3, | |
180 T_BOOLEAN, // T_BOOLEAN = 4, | |
181 T_CHAR, // T_CHAR = 5, | |
182 T_FLOAT, // T_FLOAT = 6, | |
183 T_DOUBLE, // T_DOUBLE = 7, | |
184 T_BYTE, // T_BYTE = 8, | |
185 T_SHORT, // T_SHORT = 9, | |
186 T_INT, // T_INT = 10, | |
187 T_LONG, // T_LONG = 11, | |
188 T_OBJECT, // T_OBJECT = 12, | |
189 T_OBJECT, // T_ARRAY = 13, | |
190 T_VOID, // T_VOID = 14, | |
191 T_ADDRESS, // T_ADDRESS = 15, | |
192 T_CONFLICT // T_CONFLICT = 16, | |
193 }; | |
194 | |
195 | |
196 BasicType type2wfield[T_CONFLICT+1] = { | |
197 (BasicType)0, // 0, | |
198 (BasicType)0, // 1, | |
199 (BasicType)0, // 2, | |
200 (BasicType)0, // 3, | |
201 T_INT, // T_BOOLEAN = 4, | |
202 T_INT, // T_CHAR = 5, | |
203 T_FLOAT, // T_FLOAT = 6, | |
204 T_DOUBLE, // T_DOUBLE = 7, | |
205 T_INT, // T_BYTE = 8, | |
206 T_INT, // T_SHORT = 9, | |
207 T_INT, // T_INT = 10, | |
208 T_LONG, // T_LONG = 11, | |
209 T_OBJECT, // T_OBJECT = 12, | |
210 T_OBJECT, // T_ARRAY = 13, | |
211 T_VOID, // T_VOID = 14, | |
212 T_ADDRESS, // T_ADDRESS = 15, | |
213 T_CONFLICT // T_CONFLICT = 16, | |
214 }; | |
215 | |
216 | |
217 int type2aelembytes[T_CONFLICT+1] = { | |
218 0, // 0 | |
219 0, // 1 | |
220 0, // 2 | |
221 0, // 3 | |
222 T_BOOLEAN_aelem_bytes, // T_BOOLEAN = 4, | |
223 T_CHAR_aelem_bytes, // T_CHAR = 5, | |
224 T_FLOAT_aelem_bytes, // T_FLOAT = 6, | |
225 T_DOUBLE_aelem_bytes, // T_DOUBLE = 7, | |
226 T_BYTE_aelem_bytes, // T_BYTE = 8, | |
227 T_SHORT_aelem_bytes, // T_SHORT = 9, | |
228 T_INT_aelem_bytes, // T_INT = 10, | |
229 T_LONG_aelem_bytes, // T_LONG = 11, | |
230 T_OBJECT_aelem_bytes, // T_OBJECT = 12, | |
231 T_ARRAY_aelem_bytes, // T_ARRAY = 13, | |
232 0, // T_VOID = 14, | |
233 T_INT_aelem_bytes, // T_ADDRESS = 15, | |
234 0 // T_CONFLICT = 16, | |
235 }; | |
236 | |
237 | |
238 // Support for 64-bit integer arithmetic | |
239 | |
240 // The following code is mostly taken from JVM typedefs_md.h and system_md.c | |
241 | |
242 static const jlong high_bit = (jlong)1 << (jlong)63; | |
243 static const jlong other_bits = ~high_bit; | |
244 | |
245 jlong float2long(jfloat f) { | |
246 jlong tmp = (jlong) f; | |
247 if (tmp != high_bit) { | |
248 return tmp; | |
249 } else { | |
250 if (g_isnan((jdouble)f)) { | |
251 return 0; | |
252 } | |
253 if (f < 0) { | |
254 return high_bit; | |
255 } else { | |
256 return other_bits; | |
257 } | |
258 } | |
259 } | |
260 | |
261 | |
262 jlong double2long(jdouble f) { | |
263 jlong tmp = (jlong) f; | |
264 if (tmp != high_bit) { | |
265 return tmp; | |
266 } else { | |
267 if (g_isnan(f)) { | |
268 return 0; | |
269 } | |
270 if (f < 0) { | |
271 return high_bit; | |
272 } else { | |
273 return other_bits; | |
274 } | |
275 } | |
276 } | |
277 | |
278 // least common multiple | |
279 size_t lcm(size_t a, size_t b) { | |
280 size_t cur, div, next; | |
281 | |
282 cur = MAX2(a, b); | |
283 div = MIN2(a, b); | |
284 | |
285 assert(div != 0, "lcm requires positive arguments"); | |
286 | |
287 | |
288 while ((next = cur % div) != 0) { | |
289 cur = div; div = next; | |
290 } | |
291 | |
292 | |
293 julong result = julong(a) * b / div; | |
294 assert(result <= (size_t)max_uintx, "Integer overflow in lcm"); | |
295 | |
296 return size_t(result); | |
297 } |